CN106476536A - Vehicle drive unit - Google Patents
Vehicle drive unit Download PDFInfo
- Publication number
- CN106476536A CN106476536A CN201610720052.5A CN201610720052A CN106476536A CN 106476536 A CN106476536 A CN 106476536A CN 201610720052 A CN201610720052 A CN 201610720052A CN 106476536 A CN106476536 A CN 106476536A
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- China
- Prior art keywords
- drive axle
- pair
- axle
- drive
- vehicle
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
- B60K17/00—Arrangement or mounting of transmissions in vehicles
- B60K17/04—Arrangement or mounting of transmissions in vehicles characterised by arrangement, location, or kind of gearing
- B60K17/16—Arrangement or mounting of transmissions in vehicles characterised by arrangement, location, or kind of gearing of differential gearing
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60B—VEHICLE WHEELS; CASTORS; AXLES FOR WHEELS OR CASTORS; INCREASING WHEEL ADHESION
- B60B35/00—Axle units; Parts thereof ; Arrangements for lubrication of axles
- B60B35/12—Torque-transmitting axles
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
- B60K1/00—Arrangement or mounting of electrical propulsion units
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60B—VEHICLE WHEELS; CASTORS; AXLES FOR WHEELS OR CASTORS; INCREASING WHEEL ADHESION
- B60B35/00—Axle units; Parts thereof ; Arrangements for lubrication of axles
- B60B35/12—Torque-transmitting axles
- B60B35/121—Power-transmission from drive shaft to hub
- B60B35/122—Power-transmission from drive shaft to hub using gearings
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
- B60K17/00—Arrangement or mounting of transmissions in vehicles
- B60K17/04—Arrangement or mounting of transmissions in vehicles characterised by arrangement, location, or kind of gearing
- B60K17/16—Arrangement or mounting of transmissions in vehicles characterised by arrangement, location, or kind of gearing of differential gearing
- B60K17/165—Arrangement or mounting of transmissions in vehicles characterised by arrangement, location, or kind of gearing of differential gearing provided between independent half axles
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H48/00—Differential gearings
- F16H48/06—Differential gearings with gears having orbital motion
- F16H48/08—Differential gearings with gears having orbital motion comprising bevel gears
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H57/00—General details of gearing
- F16H57/02—Gearboxes; Mounting gearing therein
- F16H57/037—Gearboxes for accommodating differential gearings
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
- B60K17/00—Arrangement or mounting of transmissions in vehicles
- B60K17/22—Arrangement or mounting of transmissions in vehicles characterised by arrangement, location, or type of main drive shafting, e.g. cardan shaft
- B60K17/24—Arrangements of mountings for shafting
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
- B60K17/00—Arrangement or mounting of transmissions in vehicles
- B60K17/34—Arrangement or mounting of transmissions in vehicles for driving both front and rear wheels, e.g. four wheel drive vehicles
- B60K17/356—Arrangement or mounting of transmissions in vehicles for driving both front and rear wheels, e.g. four wheel drive vehicles having fluid or electric motor, for driving one or more wheels
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
- B60K1/00—Arrangement or mounting of electrical propulsion units
- B60K2001/001—Arrangement or mounting of electrical propulsion units one motor mounted on a propulsion axle for rotating right and left wheels of this axle
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60Y—INDEXING SCHEME RELATING TO ASPECTS CROSS-CUTTING VEHICLE TECHNOLOGY
- B60Y2306/00—Other features of vehicle sub-units
- B60Y2306/01—Reducing damages in case of crash, e.g. by improving battery protection
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H57/00—General details of gearing
- F16H57/02—Gearboxes; Mounting gearing therein
- F16H2057/02034—Gearboxes combined or connected with electric machines
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Transportation (AREA)
- General Engineering & Computer Science (AREA)
- General Details Of Gearings (AREA)
- Retarders (AREA)
- Arrangement And Driving Of Transmission Devices (AREA)
Abstract
A kind of vehicle drive unit (10), which includes：Driving source (11)；Drive axle (18), using the power from driving source, carrys out the rotation of driving moment (41,42) via the drive shaft (51,52) of the first end (18bL, 18cR) for being connected to drive axle；Transfer unit (14), is connected to the second end (18cL, 18bR) of drive axle, and transfers power to drive axle；Housing (20), accommodates at least transfer unit, and is provided with opening portion (20a1,20b1), and drive axle passes through opening portion, and first end is located at outside housing；Bearing (21a, 21b), is pivotably supported one of drive axle in housing；And cylindrical component (12), the column of two open ends is formed with, wherein, a drive axle is to be coaxially arranged on these bearings through cylindrical component in the way of.The present invention is prevented from over load affects the motion of vehicle.
Description
Technical field
It relates to a kind of vehicle drive unit.
Background technology
JP2009-121553A (bibliography 1) and JP2010-246180A (bibliography 2) disclose a type of
Vehicle drive unit.Vehicle drive unit disclosed in bibliography 1 and bibliography 2 is by the power warp of motor (driving source)
A pair of output shaft (drive axle (drive is delivered to by reducing gear and differential gear (differential apparatus)
axle)).Wheel is to drive rotation by being connected to the drive shaft of the first end of drive axle.
In order to improve the security of vehicle, in vehicle development, be damaged based on the structural elements of vehicle it is assumed that entering
The athletic meeting with regard to vehicle of having gone is studied by much impacts.For example, vehicle is advanced or more speed at a predetermined velocity at which
Roll during traveling on a kerbstone, and in the state of two wheels have locked out, it is possible to think that over load is applied in
Arrive the driving path from driving source to wheel.Sheared because of over load in the shaft component for assuming to expose outside from drive shaft
In the state of, it is possible to think that shaft component is turned round below the base plate (floor panel) of vehicle, and with vehicle or road surface
Interfere, and then affect the motion of vehicle.
Content of the invention
Accordingly, it would be desirable to such a vehicle drive unit：Even if being applied to from driving source to wheel in over load
In the state of driving path, this vehicle drive unit is also prevented from over load affects the motion of vehicle.
According to a scheme of the disclosure, vehicle drive unit includes：Driving source；A pair of drive axle, using from driving source
The power of transmission, carrys out the rotation of driving moment via the drive shaft of the first end for being connected to this pair of drive axle；Transfer unit,
The second end of this pair of drive axle is connected to, and the power of driving source is delivered to this pair of drive axle；Housing, accommodates at least
Transfer unit, and a pair of openings portion is provided with, this pair of drive axle is through this to opening portion, and causes first end to be located at shell
Outside body；A pair of bearings, a drive axle being pivotably supported in housing in this pair of drive axle；And cylindrical component,
The column of two open ends is formed with, wherein, a drive axle is set in the way of coaxially passing through cylindrical component
Between this pair of bearings.One drive axle includes predetermined diameter axle portion, and the shaft diameter of predetermined diameter axle portion is configured to, makes
Obtain outer circle wall surface inner peripheral wall spaced surface preset distance radially in cylindrical component with cylindrical component.Depression
Portion is formed in the outer circle wall surface of predetermined diameter axle portion.
In the state of over load is applied to the driving path from driving source to wheel, stress can be concentrated on and driven
At the depressed part formed in the outer circle wall surface of bridge.As depressed area is within housing, therefore, it is possible to the drive in housing
The weak part that is sheared by over load is formed on dynamic path.Therefore, even if assuming that drive axle is subject in the position of depressed part
Shearing, still is able to prevent the cut part of drive axle from vibrating outside vehicle, or prevents cut part and vehicle or the road surface of drive axle
Between come in contact.As a result, even if over load is applied to driving path, it is also possible to prevent over load impact vehicle
Motion.
In the vehicle drive unit according to the solution of the present invention, depressed part may be disposed at the axis along a drive axle
Direction and opening portion position spaced a predetermined distance, a drive axle passes through the opening portion.
In the vehicle drive unit according to the solution of the present invention, length of the said one drive axle along the direction of axis can
To be configured to be longer than the length of another drive axle along the direction of axis of this pair of drive axle.
In the vehicle drive unit according to the solution of the present invention, annular protrusion may be formed at and drive positioned at said one
Near depressed part on the outer circle wall surface of bridge so that the protuberance is radially square in the whole circumference of this drive axle
To outwardly, and terminal part is formed to be curved surface.
In the vehicle drive unit according to the solution of the present invention, transfer unit can also include differential gear, differential dress
Put and the power of driving source is assigned to this pair of drive axle.
In the vehicle drive unit according to the solution of the present invention, driving source can be motor, and be arranged on shell
In vivo, and cylindrical component can be the output shaft of motor.
Description of the drawings
From detailed description below and refer to the attached drawing, significantly more can obtain the disclosure above-mentioned and additional feature and
Feature, in the accompanying drawings：
Fig. 1 is the rear portion transaxle (rear transaxle) for illustrating vehicle in first embodiment disclosed herein
The frame diagram of schematic configuration；
Fig. 2 is the partial lengthwise sectional view of the rear portion transaxle shown in Fig. 1；And
Fig. 3 is the partial enlargement longitudinal direction of the drive axle of the rear portion transaxle of vehicle in second embodiment disclosed herein
Sectional view.
Specific embodiment
First embodiment
Hereinafter, it will the vehicle drive unit of first embodiment disclosed by the invention is described in reference to the drawings.First
The vehicle drive unit of embodiment is rear portion transaxle 10, and transaxle 10 drives electric four-wheel drive vehicle (below
Be referred to as vehicle) trailing wheel 41 and 42 (equivalent to wheel disclosed herein).The front-wheel (not shown) of vehicle (is not shown by engine
Go out) power driving.In this manual, in order to illustrate, the upper side and lower side in Fig. 1 refers respectively to rear portion transaxle
10 the upper side and lower side, and similarly, right side and left side refer respectively to right side and the left side of transaxle 10.In Fig. 1 extremely
In Fig. 3, each direction is illustrated by arrow.
As shown in figure 1, rear portion transaxle 10 includes：Motor 11 (equivalent to driving source disclosed herein)；Output
Axle 12 (equivalent to cylindrical component disclosed herein)；Countershaft 13；First reduction gearing is to 14；Differential carrier 15；Second reducing gear
Take turns to 16；Differential attachment 17；A pair of drive axle 18；And variable speed drives axle housing 20 (equivalent to housing disclosed herein).
Output shaft 12 is the output shaft of motor 11.Output shaft 12 is formed with the column of two open ends.Output
Axle 12 is configured to coaxial with the axis 18a of above-mentioned a pair of drive axle 18.The rotor 11a of motor 11 is connected to output shaft 12
The central portion on outer circle wall surface.A pair of bearings 21a and 21b are separately mounted to two sides of output shaft 12.Bearing 21a and
21b is rolling bearing.Output shaft 12 is via this pair of bearings 21a and 21b, and is pivotably supported by variable speed drives axle housing.
Countershaft 13 is set above or parallel to output shaft 12.
First reduction gearing includes the countershaft drive gear 22 of minor diameter and the countershaft driven gear 23 of major diameter to 14.Secondary
Axle driving gear 22 is integrally fixed to the right part of output shaft 12.Nibble with countershaft drive gear 23 in countershaft driven gear 23
In the state of conjunction, countershaft driven gear 23 is integrally fixed to the left end side of countershaft 13.A pair of bearings 24a and 24b are distinguished
It is installed on two ends of countershaft 13.Bearing 24a and 24b are rolling bearings.Countershaft 13 via this pair of bearings 24a and 24b,
And be pivotably supported by variable speed drives axle housing 20.
Differential carrier 15 accommodates differential attachment 17 (being described below).Differential carrier 15 is arranged on the right side of output shaft 12
Side.Differential carrier 15 is formed column, and including boss portion 15a and 15b, boss portion 15a and 15b are along the side of axis 18a
To being separately positioned on both sides and coaxial with axis 18a.A pair of bearings 27a and 27b are respectively installed in boss portion 15a and 15b
External peripheral surface on.Bearing 27a and 27b are taper roll bearings, and are applied in supercharging thereon.Differential carrier 15 is via this
A pair of bearings 27a and 27b and supported by variable speed drives axle housing 20 so that differential carrier 15 can be rotated around axis 18a, the axle
Line 18a is the center of rotary shaft.
Second reduction gearing is arranged along the direction of axis 18a and is displaced to the right side from the first reduction gearing to 14 to 16
Side.Second reduction gearing includes the final driving gear 25 of minor diameter and the final driven gear 26 of major diameter to 16.Final drive
Moving gear 25 is integrally fixed to the right part of countershaft 13.Final driven gear 26 is arranged along the direction of axis 18a
And right side is displaced to from countershaft drive gear 22.In the state of final driven gear 26 is engaged with final drive gear 25, most
Whole driven gear 26 is installed in the outer circumference portion of differential carrier 15 and is integrally fixed to thereon.That is, finally driven
Gear 26 is via this pair of bearings 27a and 27b, and is pivotably supported by variable speed drives axle housing 20.
Differential attachment 17 is conventionally known bevel gear type.Differential attachment 17 includes：A pair of side gear 28a and 28b；Little tooth
Wheel shaft 29；And a pair of little gear 30a and 30b.Side gear 28a and 28b are arranged on differential carrier in the way of facing with each other
In rotary shaft (axis 18a) inside 15 in the heart.The state between side gear 28a and 28b is arranged in pinion shaft 29
Under, pinion shaft 29 is fixed to differential carrier 15, and the center of the rotary shaft perpendicular to differential carrier 15.Above-mentioned little a pair tooth
Wheel 30a and 30b is pivotably supported by pinion shaft 29, and is configured to engage with above-mentioned a pair of side gear 28a and 28b.
Above-mentioned a pair of drive axle 18 is integrally attached to above-mentioned a pair of side gear 28a and 28b.Will hereafter specifically describe
State a pair of drive axle 18.
Differential attachment 17 and differential carrier 15 constitute differential gearing 19 (equivalent to differential gear disclosed herein).Difference
The power of motor 11 is assigned to this pair of drive axle 18 by moving gear device 19.Specifically, differential gearing 19 is by moment of torsion
(power) is delivered to this pair of drive axle 18, while it is poor to allow to exist rotary speed between this pair of drive axle 18, wherein, described
Moment of torsion (power) via the first reduction gearing to 14 and second reduction gearing be decelerated to 16 and passed from motor 11
It is delivered to differential gearing 19.This pair of drive axle 18 is driven in rotation, and thus trailing wheel 41 and 42 via drive shaft 51 and 52
And it is driven in rotation (being described below).First reduction gearing is to the 14, second reduction gearing to 16 and differential gearing 19
Equivalent to transfer unit disclosed herein.
Variable speed drives axle housing 20 is accommodated：Motor 11；Output shaft 12；Countershaft 13；First reduction gearing is to 14；Differential carrier
15；Second reduction gearing is to 16；A pair of drive axle 18；And differential gearing 19.Variable speed drives axle housing 20 is formed post
Shape, and including boss portion 20a and 20b, boss portion 20a and 20b are separately positioned on variable speed drives axle housing along the direction of axis 18a
Coaxial with axis 18a on 20 two side walls.Opening portion 20a1 and 20b1 are respectively formed in boss portion 20a and 20b, and
And this pair of drive axle 18 passes through opening portion 20a1 and 20b1.
Lubricating oil (not shown) is stored in the bottom of variable speed drives axle housing 20.Lubricating oil is by countershaft driven gear 23
Rotation and the rotation of final driven gear 26, and be delivered up from the bottom of variable speed drives axle housing 20, and through oil circuit (not
Illustrate) it is supplied to lubricant housings.These lubricant housings equivalent to the first reduction gearing to 14 and second reduction gearing to 16
Site of engagement, differential attachment 17, bearing 21a, 21b, 24a, 24b, 27a and 27b, the meshing gear position of the inside of output shaft 12
With rotational slide position, etc..
This pair of drive axle 18 will hereinafter be specifically described.
This pair of drive axle 18 adopts torque (power), drives trailing wheel via drive shaft 51 and 52 (being described below)
41 and 42 rotation, the torque are transmitted to from motor 11.This pair of drive axle 18 is right drive axle 18c (equivalent to here
Disclosed second drive axle) and left drive axle 18b (equivalent to the first drive axle disclosed herein).
Left drive axle 18b is disposed across left opening portion 20a1.The right part 18bR of left drive axle 18b is (equivalent to this
In disclosed the second end) be integrally attached to left side gear 28a.The left part 18bL of left drive axle 18b is (equivalent to public here
The first end that opens) it is configured to, left part 18bL is located at outside variable speed drives axle housing 20.The right part of drive shaft 51 is connected to
The left part 18bL of left drive axle 18b.Trailing wheel 41 is connected to the left part of drive shaft 51.
Bearing 31 is installed on left drive axle 18b.Bearing 31 is rolling bearing, and is arranged in the 20a1 of opening portion.
Left drive axle 18b is via bearing 31, and is pivotably supported by variable speed drives axle housing 20.Additionally, left drive axle 18b is via differential
Boss portion 15a of device shell 15, and be pivotably supported by bearing 27a.Thus, bearing 31 and 27a are in variable speed drives axle housing 20
It is pivotably supported left drive axle 18b.Bearing 31 and 27a are equivalent to a pair of bearings disclosed herein.
Left drive axle 18b is arranged within output shaft 12, positioned at bearing 31 in the way of coaxially passing through output shaft 12
Between 27a.Thus, output shaft 12 is arranged between bearing 31 and 27a.
As shown in Fig. 2 predetermined diameter axle portion 18b1 and depressed part 18b2 are formed in left drive axle 18b.
Predetermined diameter axle portion 18b1 is formed in a part of left drive axle 18b, and the left drive axle 18b in this part is located at output shaft
Within 12.The shaft diameter D of predetermined diameter axle portion 18b1 is configured to so that the outer circle wall surface of predetermined diameter axle portion 18b1
18b1a radially with the inner peripheral wall surface 12a of output shaft 12 ds spaced a predetermined distance.Predetermined distance d s is configured to,
Even if assuming to be sheared at any position of the left drive axle 18b in predetermined diameter axle portion 18b1, and left drive axle 18b shaking
Swing, the outer circle wall surface 18b1a of predetermined diameter axle portion 18b1 still will not be contacted with the inner peripheral wall surface 12a of output shaft 12.
Predetermined distance d s is change in size of clearance (gap) amount, left drive axle 18b and output shaft 12 based on bearing 31 and 27a etc.
Come set.The shaft diameter D of predetermined diameter axle portion 18b1 is configured to the diameter of the other parts less than left drive axle 18b.
Depressed part 18b2 is formed in the outer circle wall surface 18b1a of predetermined diameter axle portion 18b1.Depressed part 18b2 be
The annular groove formed in the whole circumference of predetermined diameter axle portion 18b1.The size of depressed part 18b2 and shaft diameter D are set, with
Just the intensity for guaranteeing left drive axle 18b is sufficient for the specification torque of rear portion transaxle 10.Depressed part
The size of 18b2 and shaft diameter D are configured to so that depressed part 18b2 becomes the driving road from motor 11 to trailing wheel 41 and 42
Most weak part on footpath.
The position of depressed part 18b2 is configured to, even if assuming that left drive axle 18b is subject at the position of depressed part 18b2
Shearing, the part in the left side positioned at cut part (depressed part 18b2) of left drive axle 18b are not still fallen out to variable speed drives
Outside axle housing 20.Specifically, depressed part 18b2 is positioned along the left end of axis 18a and opening portion 20a1 Ls spaced a predetermined distance
Position.Preset distance Ls allows for left drive axle 18b, drive shaft 51 and the respective clearance amount of trailing wheel 41 (along axis 18a side
To gap length) and each connecting portion clearance amount summation value setting.Preset distance Ls is configured to, i.e.,
Make in view of clearance amount, the cut part of left drive axle 18b is still located within output shaft 12.
Length of the left drive axle 18b along the direction of axis 18a is configured to be longer than right drive axle 18c along the side of axis 18a
To length.
As shown in figure 1, right drive axle 18c is disposed across right opening portion 20b1.The left part 18cL of right drive axle 18c
(equivalent to the second end disclosed herein) is integrally attached to right side gear 28b.Right part 18cR (the phase of right drive axle 18c
When in first end disclosed herein) it is configured so that right part 18cR is located at outside variable speed drives axle housing 20.Drive shaft 52
Left part be connected to the right part 18cR of right drive axle 18c.Trailing wheel 42 is connected to the right part of drive shaft 52.Right drive axle
The shaft diameter of 18c is set to be greater than the shaft diameter D of predetermined diameter axle portion 18b1.
Multiple containment members 32 are separately positioned in opening portion 20a1 and 20b1, so as to sealing opening portion 20a1 and 20b1
With the gap between this pair of drive axle 18.Containment member 32 has prevents the lubricating oil in variable speed drives axle housing 20 from opening portion
The oil seal function that 20a1 and 20b1 are leaked out, and prevent foreign matter from penetrating into transaxle through opening portion 20a1 and 20b1
Dust seal function in shell 20.
Hereinafter, it will be described in over load be applied to driving path when, the operation of rear portion transaxle 10.
For example, the operation based on it is assumed hereinafter that：Vehicle at a predetermined velocity or more speed advance when be rolled by a kerbstone, and
In the state of two trailing wheels 41,42 have locked out, over load is applied to driving path, and undue torque may be applied to
This pair of drive axle 18.
In the state of excessive torsional moment is applied to this pair of drive axle 18, stress concentration at depressed part 18b2,
The depressed part is to drive the weak part on path.Hereinafter, it will based on it is assumed hereinafter that providing explanation：Left drive axle
18b is sheared in the position of depressed part 18b2 because of excessive torsional moment.
In this state, as described above, the part on the left of cut part (depressed part 18b2) of left drive axle 18b does not have
Fall to outside the 20a1 of opening portion, and the cut part of left drive axle 18b is located within output shaft 12.The position of left drive axle 18b
Vibrate around bearing 31 in the part in the left side of cut part.In contrast, the part on the right side positioned at cut part of left drive axle 18b
Boss portion 15a around differential carrier 15 vibrates.Meanwhile, as described above, the cut part of left drive axle 18b does not have and output shaft 12
Inner peripheral wall surface 12a is contacted.
In this state, the load of trailing wheel 41 is not applied to the right side positioned at cut part of left drive axle 18b
Part.Therefore, via differential gearing 19, (this side is applied in the power of motor 11 to be only delivered to left drive axle 18b side
Smaller load).That is, the power of motor 11 is not transferred into right drive axle 18c.In this case, vehicle is only to lead to
The mode of rotation of front-wheel (not shown) is crossed advancing, front-wheel is rotated by the power drive of engine (not shown).
In the first embodiment, rear portion transaxle 10 includes：Motor 11；A pair of drive axle 18, which is adopted from electricity
The power that motivation 11 is transmitted, drives 41 He of trailing wheel via the drive shaft 51 and 52 of left part 18bL and right part 18cR is connected to
42 rotation；Transfer unit, which is connected to the right part 18bR and left part 18cL of this pair of drive axle 18, and by driving source
Power is delivered to this pair of drive axle 18；Variable speed drives axle housing 20, its accommodate at least transfer unit, and are provided with a pair of openings portion
20a1 and 20b1, this pair of drive axle 18 is through this to opening portion 20a1 and 20b1, and causes left part 18bL and right part
18cR is located at outside variable speed drives axle housing 20；A pair of bearings 31 and 27a, are pivotably supported this within variable speed drives axle housing 20
The left drive axle 18b of a pair of drive axle 18；And output shaft 12, which is formed with the column of two open ends, and wherein,
Left drive axle 18b is arranged between this pair of bearings 31 and 27a in the way of coaxially passing through output shaft 12.Left drive axle
18b includes predetermined diameter axle portion 18b1；The shaft diameter D of the predetermined diameter axle portion is configured to, and outer circle wall surface 18b1a is along footpath
To direction in the output shaft 12 with the inner peripheral wall surface 12a of output shaft 12 ds spaced a predetermined distance.Depressed part 18b2 is formed in
In the outer circle wall surface 18b1a of predetermined diameter axle portion 18b1.
Therefore, in the state of over load is applied to from motor 11 to the driving path of trailing wheel 41 and 42, stress
Can concentrate at the depressed part formed in the outer circle wall surface 18b1a of predetermined diameter axle portion 18b1 of left drive axle 18b.By
It is located within variable speed drives axle housing 20 in depressed part 18b2, therefore, it is possible in the driving path being located within transaxle shell 20
Upper formation is subject to the weak part that shears due to over load.Therefore, even if assuming left drive axle 18b depressed part 18b2's
Position is sheared, and still is able to prevent the cut part of left drive axle 18b from vibrating outside vehicle, or prevents left drive axle 18b
Cut part and vehicle or road surface between come in contact.As a result, even if over load is applied to driving path, it is also possible to anti-
Only over load affects the motion of vehicle.
Depressed part 18b2 is arranged within output shaft 12, and predetermined diameter axle portion 18b1 of left drive axle 18b is outer
Circumferential wall surface 18b1a is along the inner peripheral wall surface 12a ds spaced a predetermined distance of radial direction and the output shaft 12 of drive axle 18.
Therefore, even if assuming that left drive axle 18b is sheared in the position of depressed part 18b2, it still is able to prevent cutting for left drive axle 18b
Cut generation contact between portion and the inner peripheral wall surface 12a of output shaft 12.As a result, it is possible to prevent cutting due to left drive axle 18b
Cut the contact between portion and the inner peripheral wall surface 12a of output shaft 12, and the impact produced by the motion of vehicle.Thus, it is possible to disappear
Except such misgivings：For example due to the outer circle wall surface 18b1a of left drive axle 18b and the inner peripheral wall surface of output shaft 12
Contact repeatedly between 12a and produce frictional heat, and then cause the generation of seizure (seizure).
Depressed part 18b2 is positioned along the position of the direction of axis 18a and opening portion 20a1 Ls spaced a predetermined distance, its
In, left drive axle 18b passes through opening portion 20a1.
Specifically, based on trailing wheel 41 and 42, drive shaft 51 and 52 and drive axle 18b and 18c each middle clearance for being formed
Amount, depressed part 18b2 are positioned along the position of the direction of axis 18a and opening portion 20a1 Ls spaced a predetermined distance.Therefore, i.e.,
The left drive axle 18b of hypothesis is made to be sheared in the position of depressed part 18b2, the portion in the left side positioned at cut part of left drive axle 18b
Divide and can still be prevented from through opening portion 20a1 and outside falling to variable speed drives axle housing 20.As a result, it is possible to be reliably prevented because of left drive
Contact between the cut part of dynamic bridge 18b and road surface etc. and affect the motion of vehicle.
Length of the left drive axle 18b along the direction of axis 18a is configured to be longer than right drive axle 18c along the side of axis 18a
To length.
Therefore, it is possible to increase preset distance Ls further.As a result, even if assuming left drive axle 18b depressed part 18b2's
Position is sheared, the part in the left side positioned at cut part of left drive axle 18b remain able to be prevented from through opening portion 20a1 and
Fall to outside variable speed drives axle housing 20.
Rear portion transaxle 10 also includes differential gearing 19, and the power of motor 11 is divided by differential gearing 19
It is fitted on this pair of drive axle 18.
Therefore, in the state of assuming that left drive axle 18b is sheared, the load of trailing wheel 41 is not applied to left driving
The part positioned at shearing right side of bridge 18b.In this state, as described above, the power of motor 11 will not be via differential gear
Wheel apparatus 19 and be passed to right drive axle 18c.As the power of motor 11 is not transferred in both trailing wheels 41 and 42
Any one on, so compared with the state for not including differential gearing 19 with rear portion transaxle 10, can also prevent vehicle
Motion be affected, and the rotation of only right drive axle 18c or trailing wheel 42 by motor 11 power driving.
The driving source of first embodiment is motor 11, and is arranged within variable speed drives axle housing 20.First embodiment
Cylindrical component be motor 11 output shaft 12.
Therefore, additionally, (wherein driving source is arranged within variable speed drives axle housing 20 in rear portion transaxle 10
Motor 11, and left drive axle 18b is coaxially through the inside of the output shaft 12 of motor 11), assuming left drive axle
18b can prevent the motion of vehicle to be affected in the state of the position of depressed part 18b2 is sheared.
Second embodiment
Hereinafter, it will mainly describe in second embodiment disclosed herein, rear portion transaxle 10 and first
Difference in embodiment.In a second embodiment, in addition to the construction of first embodiment, formed in left drive axle 18b
There is protuberance 118b3.
As shown in figure 3, protuberance 118b3 in a ring is formed at the outer circle wall surface of predetermined diameter axle portion 18b1
Near depressed part 18b2 on 18b1a so that protuberance 118b3 is radially in the whole circumference of predetermined diameter axle portion 18b1
On outwardly.In a second embodiment, protuberance 118b3 is formed near the left side of depressed part 18b2.Terminal part 118b4
Surface is formed to be curved in the whole circumference of protuberance 118b3.The size of protuberance 118b3 is configured to, terminal part
118b4 is not contacted with the inner peripheral wall surface 12a of output shaft 12.
In the state of assuming that left drive axle 18b is sheared in the position of depressed part 18b2, as described above, left drive axle
The left part of 18b is vibrated around bearing 31.The size of protuberance 118b3 is configured to, and in this state, terminal part 118b4 will not
Contact with the inner peripheral wall surface 12a of output shaft 12.Due to as described above, lubricating oil is supplied to the inside of output shaft 12, because
Even and if terminal part 118b4 is contacted with the inner peripheral wall surface 12a of output shaft 12 and the inner peripheral wall surface 12a slip that reclines, end
Resistance to sliding between end 118b4 and inner peripheral wall surface 12a is still reduced.
In a second embodiment, annular protrusion 118b3 is formed at predetermined diameter axle portion 18b1 of left drive axle 18b
Outer circle wall surface 18b1a on depressed part 18b2 near so that protuberance 118b3 is radially in predetermined diameter axle portion
In the whole circumference of 18b1 outwardly, and terminal part 118b4 is formed to be curved surface.
Therefore, in the state of left drive axle 18b is sheared in the position of depressed part 18b2, protuberance 118b3 is permissible
The inner peripheral wall surface 12a of contact output shaft 12 its slip that reclines.As a result, with the state phase for not forming protuberance 118b3
Than the hunting angle of left drive axle 18b can also be reduced, thus the load for being applied to bearing 31 is reduced.Due to protuberance
The terminal part 118b4 of 118b3 is formed to be curved surface in this state, it is possible to preventing the inner circle of scratch output shaft 12
Perpendicular wall surfaces 12a.As the terminal part 118b4 of protuberance 118b3 is formed to be curved surface in this state, it is possible to
Reduce the resistance to sliding between terminal part 118b4 and inner peripheral wall surface 12a.As a result, it is possible to prevent because of terminal part 118b4
The frictional heat that generates between the 12a of inner peripheral wall surface and the seizure that causes.
In these embodiments, some examples of rear portion transaxle 10 are merely illustrative.The disclosure is not limited to this
A little constructions, and also can be using other constructions.In the first embodiment, depressed part 18b2 is formed positioned at predetermined diameter axle
Annular groove in portion 18b1.Alternatively, depressed part 18b2 circumferentially can be formed in a part of predetermined diameter axle portion in direction
In 18b1.
In an embodiment, predetermined diameter axle portion 18b1 is formed in left drive axle 18b.Alternatively, predetermined diameter axle portion
18b1 is may be formed in right drive axle 18c.In this state, length of the right drive axle 18c along the direction of axis 18a can be by
It is set to the length for being longer than left drive axle 18b along the direction of axis 18a.
In a second embodiment, protuberance 118b3 is formed in the left side of depressed part 18b2.Alternatively, protuberance 118b3
May be formed at the right side of depressed part 18b2.Also protuberance 118b3 can be formed respectively in the both sides of depressed part 18b2.
In an embodiment, motor 11 is arranged within variable speed drives axle housing 20.Alternatively, motor 11 can be by
It is arranged on outside variable speed drives axle housing 20.
In an embodiment, rear portion transaxle 10 includes differential gearing 19.Alternatively, rear portion transaxle
10 can not include differential gearing 19.In this state, a pair of drive axle 18 can be connected with each other, and this pair of drive
The integral-rotation of dynamic bridge 18 can be driven via final driven gear 26.
In an embodiment, rear portion transaxle 10 includes the motor 11 as driving source.Alternatively, engine can
To be driving source.In this state, the driving force of engine can be delivered to differential carrier 15 by rear portion transaxle 10,
And do not include reduction gearing to 14 and 16.As cylindrical component is not in this state equivalent to the output shaft of motor 11
12, thus cylindrical component can be integrally shaped with variable speed drives axle housing 20.
The shape of the position of predetermined diameter axle portion 18b1, the shape of depressed part 18b2 and position or protuberance 118b3 and
Position can be changed, this theory changed without departing from the disclosure.
The principle of the present invention, preferred embodiment and operator scheme are described in description above.But, it is intended that protect
The present invention of shield is not construed as limited to disclosed specific embodiment.Additionally, embodiment described here is considered as
Illustrative and not restrictive.Other technical staff can make modification in the state of the spirit without departing from the present invention and change
Become, and use equivalence.Hence it is evident that being intended to the spirit thus comprising the present invention for belonging to claims restriction
With all modifications in scope, change and equivalence.
Claims (6)
1. a kind of vehicle drive unit (10), including：
Driving source (11)；
A pair of drive axle (18), using the power from driving source transmission, via being connected to the first of the pair of drive axle
The drive shaft (51,52) of end (18bL, 18cR) carrys out the rotation of driving moment (41,42)；
Transfer unit (14), is connected to the second end (18cL, 18bR) of the pair of drive axle, and moving the driving source
Power is delivered to the pair of drive axle；
Housing (20), accommodates at least described transfer unit, and is provided with a pair of openings portion (20a1,20b1), the pair of driving
Bridge passes through the pair of opening portion, and the first end is located at outside the housing；
A pair of bearings (21a, 21b), a drive axle being pivotably supported in the housing in the pair of drive axle；
And
Cylindrical component (12), is formed with the column of two open ends, and wherein, one drive axle is coaxially to pass through
The mode of the cylindrical component, is arranged between the pair of bearing,
Wherein, one drive axle includes predetermined diameter axle portion (18b1), and the shaft diameter of the predetermined diameter axle portion is set
Become so that outer circle wall surface (18b1a) inner peripheral wall radially in the cylindrical component with the cylindrical component
Surface (12a) spaced a predetermined distance, and
Wherein, depressed part (18b2) is formed in the outer circle wall surface of the predetermined diameter axle portion.
2. vehicle drive unit according to claim 1,
Wherein, the depressed part is positioned along the direction of the axis of one drive axle and the opening portion is spaced pre- spacing
From position, one drive axle pass through the opening portion.
3. vehicle drive unit according to claim 2,
Wherein, one drive axle be configured to be longer than in the pair of drive axle along the length in the direction of axis another
Drive axle is along the length in the direction of axis.
4. vehicle drive unit according to any one of claim 1 to 3,
Wherein, the depressed part that annular protrusion (118b3) is formed on the outer circle wall surface of one drive axle is attached
Closely so that the protuberance in the whole circumference of one drive axle radially outwardly, and terminal part quilt
Be formed as curved surface.
5. vehicle drive unit according to any one of claim 1 to 4,
Wherein, the transfer unit also includes differential gear (19), and the power of the driving source is divided by differential gear (19)
It is fitted on the pair of drive axle.
6. vehicle drive unit according to any one of claim 1 to 5,
Wherein, the driving source is motor, and is arranged in the housing, and
The cylindrical component is the output shaft of the motor.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2015165684A JP2017044237A (en) | 2015-08-25 | 2015-08-25 | Vehicle drive unit |
| JP2015-165684 | 2015-08-25 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106476536A true CN106476536A (en) | 2017-03-08 |
Family
ID=56555256
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610720052.5A Pending CN106476536A (en) | 2015-08-25 | 2016-08-24 | Vehicle drive unit |
Country Status (4)
| Country | Link |
|---|---|
| US (1) | US20170057349A1 (en) |
| EP (1) | EP3138712B1 (en) |
| JP (1) | JP2017044237A (en) |
| CN (1) | CN106476536A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108177521A (en) * | 2018-01-29 | 2018-06-19 | 深圳市大地和电气股份有限公司 | The electric-powered assembly of novel coaxial formula |
| CN108995528A (en) * | 2017-06-07 | 2018-12-14 | 丰田自动车株式会社 | Vehicular transmission shaft |
| CN114454665A (en) * | 2020-11-09 | 2022-05-10 | 丰田自动车株式会社 | Drive axle for vehicle |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2016201705A1 (en) * | 2015-06-19 | 2016-12-22 | Robert Bosch Gmbh | Electric vehicle and driving system for electric vehicle |
| US10500940B2 (en) | 2017-08-18 | 2019-12-10 | Arvinmeritor Technology, Llc | Axle assembly having an electric motor module and a gear reduction module |
| US11273700B2 (en) | 2017-08-18 | 2022-03-15 | Arvinmeritor Technology, Llc | Axle assembly having an electric motor module |
| US10500941B2 (en) * | 2017-08-18 | 2019-12-10 | Arvinmeritor Technology, Llc | Axle assembly having an electric motor module and a shift mechanism |
| CN111886782B (en) | 2018-03-24 | 2023-04-28 | 日本电产株式会社 | Driving device |
| CA3095601A1 (en) | 2018-04-20 | 2019-10-24 | Magna International Inc. | Chain driven e-drive gearbox |
| US10704597B2 (en) | 2018-11-30 | 2020-07-07 | Arvinmeritor Technology, Llc | Axle assembly having a bearing preload module |
| US10985635B2 (en) | 2018-11-30 | 2021-04-20 | Arvinmeritor Technology, Llc | Axle assembly having a resolver and a method of assembly |
| US10935120B2 (en) | 2018-11-30 | 2021-03-02 | Arvinmeritor Technology, Llc | Axle assembly having a spigot bearing assembly |
| US10808830B2 (en) | 2018-11-30 | 2020-10-20 | Arvinmeritor Technology, Llc | Axle assembly with multiple lubricant chambers |
| US11038396B2 (en) | 2018-11-30 | 2021-06-15 | Arvinmeritor Technology, Llc | Axle assembly having an electric motor module and method of assembly |
| US10808834B2 (en) | 2018-11-30 | 2020-10-20 | Arvinmeritor Technology, Llc | Axle assembly and method of control |
| US10801602B2 (en) | 2018-11-30 | 2020-10-13 | Arvinmeritor Technology, Llc | Axle assembly having counterphase planet gears |
| CN113711476A (en) | 2019-04-19 | 2021-11-26 | 日本电产株式会社 | Drive device |
| JP7285684B2 (en) * | 2019-05-07 | 2023-06-02 | ダイハツ工業株式会社 | Power unit suspension structure |
| US11209072B2 (en) | 2019-10-07 | 2021-12-28 | Arvinmeritor Technology, Llc | Axle assembly having a multi-speed transmission |
| US10989288B1 (en) | 2019-10-07 | 2021-04-27 | Arvinmeritor Technology, Llc | Axle assembly having a multi-speed countershaft transmission |
| US11441644B2 (en) | 2019-10-07 | 2022-09-13 | Arvinmeritor Technology, Llc | Axle assembly having a multi-speed transmission and a drop gear set |
| US11207976B2 (en) | 2019-10-07 | 2021-12-28 | Arvinmeritor Technology, Llc | Axle assembly having a multi-speed countershaft transmission |
| DE102020208507A1 (en) * | 2020-07-07 | 2022-01-13 | Robert Bosch Gesellschaft mit beschränkter Haftung | Driving device for a vehicle and vehicle |
| US11371588B1 (en) | 2021-02-22 | 2022-06-28 | Arvinmeritor Technology, Llc | Axle assembly having a barrel cam |
| US11608877B2 (en) | 2021-02-22 | 2023-03-21 | Arvinmeritor Technology, Llc | Axle assembly having a sector cam |
| CA3239745A1 (en) * | 2021-12-01 | 2023-06-08 | James P. Downs | Electric drive unit with motor assembly isolated from beaming loads transmitted through housing assembly |
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-
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- 2016-07-28 EP EP16181618.6A patent/EP3138712B1/en not_active Not-in-force
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- 2016-08-24 CN CN201610720052.5A patent/CN106476536A/en active Pending
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| JP2009121553A (en) * | 2007-11-13 | 2009-06-04 | Honda Motor Co Ltd | Motor type power device |
| JP2010246180A (en) * | 2009-04-01 | 2010-10-28 | Fuji Heavy Ind Ltd | Electric drive system |
| EP2878857A1 (en) * | 2012-07-24 | 2015-06-03 | Aisin Seiki Kabushiki Kaisha | Lubricating structure for reduction gear |
| WO2015039611A1 (en) * | 2013-09-22 | 2015-03-26 | 格源动力有限公司 | Coaxial motor variable torque differential assembly |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108995528A (en) * | 2017-06-07 | 2018-12-14 | 丰田自动车株式会社 | Vehicular transmission shaft |
| US10933741B2 (en) | 2017-06-07 | 2021-03-02 | Toyota Jidosha Kabushiki Kaisha | Vehicular propeller shaft |
| CN108995528B (en) * | 2017-06-07 | 2021-07-13 | 丰田自动车株式会社 | Vehicle transmission shaft |
| CN108177521A (en) * | 2018-01-29 | 2018-06-19 | 深圳市大地和电气股份有限公司 | The electric-powered assembly of novel coaxial formula |
| CN114454665A (en) * | 2020-11-09 | 2022-05-10 | 丰田自动车株式会社 | Drive axle for vehicle |
| CN114454665B (en) * | 2020-11-09 | 2024-05-07 | 丰田自动车株式会社 | Drive axle for vehicle |
Also Published As
| Publication number | Publication date |
|---|---|
| EP3138712B1 (en) | 2018-02-07 |
| JP2017044237A (en) | 2017-03-02 |
| EP3138712A1 (en) | 2017-03-08 |
| US20170057349A1 (en) | 2017-03-02 |
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